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-rw-r--r--sys/dev/amr/amr_cam.c452
1 files changed, 452 insertions, 0 deletions
diff --git a/sys/dev/amr/amr_cam.c b/sys/dev/amr/amr_cam.c
new file mode 100644
index 0000000..45ecc52
--- /dev/null
+++ b/sys/dev/amr/amr_cam.c
@@ -0,0 +1,452 @@
+/*-
+ * Copyright (c) 2000 Michael Smith
+ * Copyright (c) 2000 BSDi
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+
+#include <dev/amr/amr_compat.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/devicestat.h>
+#include <sys/disk.h>
+#include <sys/stat.h>
+
+#include <cam/cam.h>
+#include <cam/cam_ccb.h>
+#include <cam/cam_sim.h>
+#include <cam/cam_xpt.h>
+#include <cam/cam_xpt_sim.h>
+#include <cam/cam_debug.h>
+#include <cam/scsi/scsi_all.h>
+#include <cam/scsi/scsi_message.h>
+
+#include <machine/resource.h>
+#include <machine/bus.h>
+
+#include <dev/amr/amrreg.h>
+#include <dev/amr/amrvar.h>
+
+static void amr_cam_action(struct cam_sim *sim, union ccb *ccb);
+static void amr_cam_poll(struct cam_sim *sim);
+static void amr_cam_complete(struct amr_command *ac);
+
+
+/********************************************************************************
+ * Enqueue/dequeue functions
+ */
+static __inline void
+amr_enqueue_ccb(struct amr_softc *sc, union ccb *ccb)
+{
+ int s;
+
+ s = splbio();
+ TAILQ_INSERT_TAIL(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
+ splx(s);
+}
+
+static __inline void
+amr_requeue_ccb(struct amr_softc *sc, union ccb *ccb)
+{
+ int s;
+
+ s = splbio();
+ TAILQ_INSERT_HEAD(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
+ splx(s);
+}
+
+static __inline union ccb *
+amr_dequeue_ccb(struct amr_softc *sc)
+{
+ union ccb *ccb;
+ int s;
+
+ s = splbio();
+ if ((ccb = (union ccb *)TAILQ_FIRST(&sc->amr_cam_ccbq)) != NULL)
+ TAILQ_REMOVE(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
+ splx(s);
+ return(ccb);
+}
+
+/********************************************************************************
+ * Attach our 'real' SCSI channels to CAM
+ */
+int
+amr_cam_attach(struct amr_softc *sc)
+{
+ struct cam_devq *devq;
+ int chn;
+
+ /* initialise the ccb queue */
+ TAILQ_INIT(&sc->amr_cam_ccbq);
+
+ /*
+ * Allocate a devq for all our channels combined. This should
+ * allow for the maximum number of SCSI commands we will accept
+ * at one time.
+ */
+ if ((devq = cam_simq_alloc(AMR_MAX_SCSI_CMDS)) == NULL)
+ return(ENOMEM);
+
+ /*
+ * Iterate over our channels, registering them with CAM
+ */
+ for (chn = 0; chn < sc->amr_maxchan; chn++) {
+
+ /* allocate a sim */
+ if ((sc->amr_cam_sim[chn] = cam_sim_alloc(amr_cam_action,
+ amr_cam_poll,
+ "amr",
+ sc,
+ device_get_unit(sc->amr_dev),
+ 1,
+ AMR_MAX_SCSI_CMDS,
+ devq)) == NULL) {
+ cam_simq_free(devq);
+ device_printf(sc->amr_dev, "CAM SIM attach failed\n");
+ return(ENOMEM);
+ }
+
+ /* register the bus ID so we can get it later */
+ if (xpt_bus_register(sc->amr_cam_sim[chn], chn)) {
+ device_printf(sc->amr_dev, "CAM XPT bus registration failed\n");
+ return(ENXIO);
+ }
+ }
+ /*
+ * XXX we should scan the config and work out which devices are actually
+ * protected.
+ */
+ return(0);
+}
+
+/********************************************************************************
+ * Disconnect ourselves from CAM
+ */
+void
+amr_cam_detach(struct amr_softc *sc)
+{
+ int chn, first;
+
+ for (chn = 0, first = 1; chn < sc->amr_maxchan; chn++) {
+
+ /*
+ * If a sim was allocated for this channel, free it
+ */
+ if (sc->amr_cam_sim[chn] != NULL) {
+ xpt_bus_deregister(cam_sim_path(sc->amr_cam_sim[chn]));
+ cam_sim_free(sc->amr_cam_sim[chn], first ? TRUE : FALSE);
+ first = 0;
+ }
+ }
+}
+
+/********************************************************************************
+ ********************************************************************************
+ CAM passthrough interface
+ ********************************************************************************
+ ********************************************************************************/
+
+/********************************************************************************
+ * Handle a request for action from CAM
+ */
+static void
+amr_cam_action(struct cam_sim *sim, union ccb *ccb)
+{
+ struct amr_softc *sc = cam_sim_softc(sim);
+
+ switch(ccb->ccb_h.func_code) {
+
+ /*
+ * Perform SCSI I/O to a physical device.
+ */
+ case XPT_SCSI_IO:
+ {
+ struct ccb_hdr *ccbh = &ccb->ccb_h;
+ struct ccb_scsiio *csio = &ccb->csio;
+
+ /* Validate the CCB */
+ ccbh->status = CAM_REQ_INPROG;
+
+ /* check the CDB length */
+ if (csio->cdb_len > AMR_MAX_CDB_LEN)
+ ccbh->status = CAM_REQ_CMP_ERR;
+
+ /* check that the CDB pointer is not to a physical address */
+ if ((ccbh->flags & CAM_CDB_POINTER) && (ccbh->flags & CAM_CDB_PHYS))
+ ccbh->status = CAM_REQ_CMP_ERR;
+
+ /* if there is data transfer, it must be to/from a virtual address */
+ if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
+ if (ccbh->flags & CAM_DATA_PHYS) /* we can't map it */
+ ccbh->status = CAM_REQ_CMP_ERR;
+ if (ccbh->flags & CAM_SCATTER_VALID) /* we want to do the s/g setup */
+ ccbh->status = CAM_REQ_CMP_ERR;
+ }
+
+ /*
+ * If the command is to a LUN other than 0, fail it.
+ * This is probably incorrect, but during testing the firmware did not
+ * seem to respect the LUN field, and thus devices appear echoed.
+ */
+ if (csio->ccb_h.target_lun != 0)
+ ccbh->status = CAM_REQ_CMP_ERR;
+
+ /* if we're happy with the request, queue it for attention */
+ if (ccbh->status == CAM_REQ_INPROG) {
+
+ /* save the channel number in the ccb */
+ csio->ccb_h.sim_priv.entries[0].field = cam_sim_bus(sim);
+
+ amr_enqueue_ccb(sc, ccb);
+ amr_startio(sc);
+ return;
+ }
+ break;
+ }
+
+ case XPT_CALC_GEOMETRY:
+ {
+ struct ccb_calc_geometry *ccg = &ccb->ccg;
+ u_int32_t size_in_mb;
+ u_int32_t secs_per_cylinder;
+
+ size_in_mb = ccg->volume_size / ((1024L * 1024L) / ccg->block_size);
+
+ if (size_in_mb > 1024) {
+ ccg->heads = 255;
+ ccg->secs_per_track = 63;
+ } else {
+ ccg->heads = 64;
+ ccg->secs_per_track = 32;
+ }
+ secs_per_cylinder = ccg->heads * ccg->secs_per_track;
+ ccg->cylinders = ccg->volume_size / secs_per_cylinder;
+ ccb->ccb_h.status = CAM_REQ_CMP;
+ break;
+ }
+
+ /*
+ * Return path stats. Some of these should probably be
+ * amended.
+ */
+ case XPT_PATH_INQ:
+ {
+ struct ccb_pathinq *cpi = & ccb->cpi;
+
+ cpi->version_num = 1; /* XXX??? */
+ cpi->hba_inquiry = PI_SDTR_ABLE;
+ cpi->target_sprt = 0;
+ cpi->hba_misc = 0;
+ cpi->hba_eng_cnt = 0;
+ cpi->max_target = AMR_MAX_TARGETS;
+ cpi->max_lun = AMR_MAX_LUNS;
+ cpi->initiator_id = 7; /* XXX variable? */
+ strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
+ strncpy(cpi->hba_vid, "BSDi", HBA_IDLEN);
+ strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
+ cpi->unit_number = cam_sim_unit(sim);
+ cpi->bus_id = cam_sim_bus(sim);
+ cpi->base_transfer_speed = 132 * 1024; /* XXX get from controller? */
+ cpi->ccb_h.status = CAM_REQ_CMP;
+
+ break;
+ }
+
+ /*
+ * Reject anything else as unsupported.
+ */
+ default:
+ /* we can't do this */
+ ccb->ccb_h.status = CAM_REQ_INVALID;
+ break;
+ }
+ xpt_done(ccb);
+}
+
+/********************************************************************************
+ * Convert a CAM CCB off the top of the CCB queue to a passthrough SCSI command.
+ */
+int
+amr_cam_command(struct amr_softc *sc, struct amr_command **acp)
+{
+ struct amr_command *ac;
+ struct amr_passthrough *ap;
+ struct ccb_scsiio *csio;
+ int bus, target, error;
+
+ error = 0;
+ ac = NULL;
+ ap = NULL;
+
+ /* check to see if there is a ccb for us to work with */
+ if ((csio = (struct ccb_scsiio *)amr_dequeue_ccb(sc)) == NULL)
+ goto out;
+
+ /* get bus/target, XXX validate against protected devices? */
+ bus = csio->ccb_h.sim_priv.entries[0].field;
+ target = csio->ccb_h.target_id;
+
+ /*
+ * Build a passthrough command.
+ */
+
+ /* construct passthrough */
+ if ((ap = malloc(sizeof(*ap), M_DEVBUF, M_NOWAIT)) == NULL) {
+ error = ENOMEM;
+ goto out;
+ }
+ bzero(ap, sizeof(*ap));
+ ap->ap_timeout = 0;
+ ap->ap_ars = 1;
+ ap->ap_request_sense_length = 14;
+ ap->ap_islogical = 0;
+ ap->ap_channel = bus;
+ ap->ap_scsi_id = target;
+ ap->ap_logical_drive_no = csio->ccb_h.target_lun;
+ ap->ap_cdb_length = csio->cdb_len;
+ if (csio->ccb_h.flags & CAM_CDB_POINTER) {
+ bcopy(csio->cdb_io.cdb_ptr, ap->ap_cdb, csio->cdb_len);
+ } else {
+ bcopy(csio->cdb_io.cdb_bytes, ap->ap_cdb, csio->cdb_len);
+ }
+ /* we leave the data s/g list and s/g count to the map routine later */
+
+ debug(2, " COMMAND %x/%d+%d to %d:%d:%d", ap->ap_cdb[0], ap->ap_cdb_length, csio->dxfer_len,
+ ap->ap_channel, ap->ap_scsi_id, ap->ap_logical_drive_no);
+
+ /* construct command */
+ if ((ac = amr_alloccmd(sc)) == NULL) {
+ error = ENOMEM;
+ goto out;
+ }
+
+ ac->ac_data = ap;
+ ac->ac_length = sizeof(*ap);
+ ac->ac_flags |= AMR_CMD_DATAOUT;
+
+ ac->ac_ccb_data = csio->data_ptr;
+ ac->ac_ccb_length = csio->dxfer_len;
+ if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
+ ac->ac_flags |= AMR_CMD_CCB_DATAIN;
+ if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
+ ac->ac_flags |= AMR_CMD_CCB_DATAOUT;
+
+ ac->ac_complete = amr_cam_complete;
+ ac->ac_private = csio;
+ ac->ac_mailbox.mb_command = AMR_CMD_PASS;
+
+out:
+ if (error != 0) {
+ if (ac != NULL)
+ amr_releasecmd(ac);
+ if (ap != NULL)
+ free(ap, M_DEVBUF);
+ if (csio != NULL) /* put it back and try again later */
+ amr_requeue_ccb(sc, (union ccb *)csio);
+ }
+ *acp = ac;
+ return(error);
+}
+
+/********************************************************************************
+ * Check for interrupt status
+ */
+static void
+amr_cam_poll(struct cam_sim *sim)
+{
+ amr_done(cam_sim_softc(sim));
+}
+
+/********************************************************************************
+ * Handle completion of a command submitted via CAM.
+ */
+static void
+amr_cam_complete(struct amr_command *ac)
+{
+ struct amr_passthrough *ap = (struct amr_passthrough *)ac->ac_data;
+ struct ccb_scsiio *csio = (struct ccb_scsiio *)ac->ac_private;
+ struct scsi_inquiry_data *inq = (struct scsi_inquiry_data *)csio->data_ptr;
+
+ /* XXX note that we're ignoring ac->ac_status - good idea? */
+
+ debug(1, "status 0x%x scsi_status 0x%x", ac->ac_status, ap->ap_scsi_status);
+
+ /*
+ * Hide disks from CAM so that they're not picked up and treated as 'normal' disks.
+ *
+ * If the configuration provides a mechanism to mark a disk a "not managed", we
+ * could add handling for that to allow disks to be selectively visible.
+ */
+#if 0
+ if ((ap->ap_cdb[0] == INQUIRY) && (SID_TYPE(inq) == T_DIRECT)) {
+ bzero(csio->data_ptr, csio->dxfer_len);
+ if (ap->ap_scsi_status == 0xf0) {
+ csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
+ } else {
+ csio->ccb_h.status = CAM_DEV_NOT_THERE;
+ }
+ } else {
+#else
+ {
+#endif
+
+ /* handle passthrough SCSI status */
+ switch(ap->ap_scsi_status) {
+ case 0: /* completed OK */
+ csio->ccb_h.status = CAM_REQ_CMP;
+ break;
+
+ case 0x02:
+ csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
+ csio->scsi_status = SCSI_STATUS_CHECK_COND;
+ bcopy(ap->ap_request_sense_area, &csio->sense_data, AMR_MAX_REQ_SENSE_LEN);
+ csio->sense_len = AMR_MAX_REQ_SENSE_LEN;
+ csio->ccb_h.status |= CAM_AUTOSNS_VALID;
+ break;
+
+ case 0x08:
+ csio->ccb_h.status = CAM_SCSI_BUSY;
+ break;
+
+ case 0xf0:
+ case 0xf4:
+ default:
+ csio->ccb_h.status = CAM_REQ_CMP_ERR;
+ break;
+ }
+ }
+ free(ap, M_DEVBUF);
+ if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
+ debug(2, "%*D\n", imin(csio->dxfer_len, 16), csio->data_ptr, " ");
+ xpt_done((union ccb *)csio);
+ amr_releasecmd(ac);
+}
+
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